Every subject is free

What would you like to learn?

Pick a subject, then choose a course designed around topics commonly taught at an approximate age or learning level. Start wherever feels useful; you can choose another course at any time.

All subjects

10 subjects · All ages

Mathematics

Counting and comparing to university analysis, algebra and probability.

35 levels · around pre-K (part A) → Advanced · Level 4

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History

First stories about the past to a course on historical method.

1 level

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Geography

Maps and places, Earth systems, human geography and geographic information systems.

8 levels · around grade 3 → Geographic information

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Economics

Money and choices to intermediate microeconomics and macroeconomics.

7 levels · around grade 3 → Econometrics

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Logic and philosophy

Thinking clearly, formal logic, argument analysis and ethics.

8 levels · around grade 5 → Philosophy of mind and metaphysics

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Physics

Science foundations and measurement to mechanics, fields and modern physics.

11 levels · around grade 3 → Thermodynamics and statistical physics

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Chemistry

Matter and change to organic chemistry.

4 levels · Chemistry 1 → Inorganic chemistry

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Astronomy

The sky from a moving Earth to stars, galaxies, astrophysics and cosmology.

2 levels · around grade 8 → Astronomy

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Memory and cognitive skills

Retrieval and study strategies, working memory, and functional cognitive support.

8 levels · Any age → Returning to routine

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Small business

Running a small business: costs, pricing, cash, customers, operations, strategy, people, growth and risk. One curriculum for every trade.

5 levels · Small business foundations → Strategy, growth and resilience

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